Answer:
A
Step-by-step explanation:
Given 4 boxes of pencils cost $5,
Unknown- slope
$1.25 per box since $5/boxes
Equation y=mx+b
Substitute $1.25/per box for m
Solve y=$1.25x
The Check
$5=$1.25/per box(4 boxes)
$5=$5
Answer:
A) y=3cos(-x)
Step-by-step explanation:
Because the amplitude of the graph is 3, this eliminates options C and D as their amplitudes are different. With the period of the graph being 2π, B cannot be correct because that would have a period of π/2. Therefore, A is correct.
Answer:
Step-by-step explanation:
Note that the highest power of x is 5, which is odd. Also note that the sign of the coefficient of x^5 is negative. Hence, the graph begins in Quadrant II, generally decreasing as x increases, and ends in Quadrant IV.
7x-4=31
7x=31+4
7x=35
x=35/7=5
4y+8=24
4y=24-8
4y=16
y=16/4=4
Hence, x=5;y=4
